"The man who begins to go to bed forty minutes before he opens his bedroom door is bored; that is to say, he is not living." A quote from a self-help book written by Arnold Bennett I'm reading off of Project Gutenberg. He has an interesting point of view: that we all live carrying regret that we have not accomplished certain things in our lives because we don't have enough time, when in reality every person has 6 hours each day when he is not eating, working or resting. The key to a fulfilling life is to actually use those hours doing the things we spend time regretting not doing. Hence, the quote's meaning -- that if we are not tired by the time we go to bed, we are not truly living. Here is the book.